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Estimated National Emissions of Nitrogen Oxides

Notes: 

Details may not add up to totals due to rounding in the source.

Description: 

KEY: R = revised.

a Industrial processes consists of chemical and allied product manufacturing, metals processing, petroleum and related industries, and other industrial processes; and solvent utilization, storage, and transport.

Source: 

U.S. Environmental Protection Agency, Air Emissions Inventories, Air Pollutant Emissions Trends Data, available at https://www.epa.gov/air-emissions-inventories/air-pollutant-emissions-tr... as of Mar. 3, 2017.